P
US7566158B2ExpiredUtilityPatentIndex 61

Display device and backlight unit for the same

Assignee: LG DISPLAY CO LTDPriority: Dec 24, 2004Filed: Jun 10, 2005Granted: Jul 28, 2009
Est. expiryDec 24, 2024(expired)· nominal 20-yr term from priority
Inventors:SOH HOE SUPLEE MAN HOANLEE SUNG KEUN
G02F 1/133615G02B 6/005G02F 1/1335
61
PatentIndex Score
6
Cited by
18
References
28
Claims

Abstract

A backlight unit for a display device is disclosed. The backlight unit includes a first optical sheet, a light source to supply light to the first optical sheet, and a first antireflection layer on a surface of the first optical sheet.

Claims

exact text as granted — not AI-modified
1. A backlight unit for a display device, comprising:
 a first optical sheet; 
 a light source to supply light to the first optical sheet; 
 a first antireflection layer on a surface of the first optical sheet, wherein the first antireflection layer includes colloid particles distributed on a surface of the first antireflection layer; 
 second, third and fourth optical sheets, wherein the four optical sheets are a diffusion sheet, first and second prism sheets, and a protection sheet; and 
 at least one second antireflection layer, the at least one second antireflection layer being disposed on surfaces of the second to fourth optical sheets, wherein the at least one second antireflection layer includes colloid particles distributed on a surface of the at least one second antireflection layer. 
 
     
     
       2. The backlight unit according to  claim 1 , wherein the first antireflection layer is on a bottom surface of the first optical sheet. 
     
     
       3. The backlight unit according to  claim 1 , wherein the first antireflection layer is on a top surface of the first optical sheet. 
     
     
       4. The backlight unit according to  claim 1 , further comprising a first bottom antireflection layer on a bottom surface of the first optical sheet. 
     
     
       5. The backlight unit according to  claim 1 , wherein the colloid particles include polystylene. 
     
     
       6. The backlight unit according to  claim 1 , wherein the colloid particles distributed on the surface of the at least one second antireflection layer include polystylene. 
     
     
       7. The backlight unit according to  claim 1 , further comprising a light guide panel on a bottom surface of the first optical sheet, wherein the light source is disposed at one side of the light guide panel. 
     
     
       8. The backlight unit according to  claim 7 , further comprising a reflector on a bottom surface of the light guide panel. 
     
     
       9. The backlight unit according to  claim 1 , wherein the light source is disposed directly underneath a bottom surface of the first optical sheet. 
     
     
       10. The backlight unit according to  claim 9 , wherein the light source includes a plurality of lamps arranged in parallel. 
     
     
       11. The backlight unit according to  claim 10 , further comprising a reflector directly underneath the light source. 
     
     
       12. A backlight unit for a display device, comprising:
 a first optical sheet; 
 a light source to supply light to the first optical sheet; 
 a first antireflection layer on a surface of the first optical sheet, wherein the first antireflection layer includes colloid particles distributed on a surface of the first antireflection layer; 
 second, third and fourth optical sheets, wherein the four optical sheets are a diffusion sheet, first and second prism sheets, and a protection sheet; and 
 at least one second antireflection layer, the at least one second antireflection layer being disposed on surfaces of the second to fourth optical sheets, wherein the at least one second antireflection layer includes an uneven surface, wherein the at least one second antireflection layer includes AZO polymer. 
 
     
     
       13. A display device, comprising:
 a display panel; 
 a first optical sheet on a bottom surface of the display panel; 
 a light source to supply light to the first optical sheet; 
 a first antireflection layer on a surface of the first optical sheet, wherein the first antireflection layer includes colloid particles distributed on a surface of the first antireflection layer; 
 second, third and fourth optical sheets, wherein the four optical sheets are a diffusion sheet, first and second prism sheets, and a protection sheet; and 
 at least one second antireflection layer, the at least one second antireflection layer being disposed on surfaces of the second to fourth optical sheets. 
 
     
     
       14. The display device according to  claim 13 , wherein the first antireflection layer is on a bottom surface of the first optical sheet. 
     
     
       15. The display device according to  claim 13 , wherein the first antireflection layer is on a top surface of the first optical sheet. 
     
     
       16. The display device according to  claim 13 , further comprising a first bottom antireflection layer on a bottom surface of the first optical sheet. 
     
     
       17. The display device according to  claim 13 , wherein the colloid particles include polystylene. 
     
     
       18. The display device according to  claim 13 , wherein the at least one second antireflection layer includes an uneven surface. 
     
     
       19. The display device according to  claim 18 , wherein the at least one second antireflection layer includes AZO polymer. 
     
     
       20. The display device according to  claim 13 , wherein the at least one second antireflection layer includes colloid particles distributed on a surface of the at least one second antireflection layer. 
     
     
       21. The display device according to  claim 20 , wherein the colloid particles distributed on the surface of the at least one second antireflection layer include polystylene. 
     
     
       22. The display device according to  claim 13 , further comprising a light guide panel on a bottom surface of the first optical sheet, wherein the light source is disposed at one side of the light guide panel. 
     
     
       23. The display device according to  claim 22 , further comprising a reflector on a bottom surface of the light guide panel. 
     
     
       24. The display device according to  claim 13 , wherein the light source is disposed directly underneath a bottom surface of the first optical sheet. 
     
     
       25. The display device according to  claim 24 , wherein the light source includes a plurality of lamps arranged in parallel. 
     
     
       26. The display device according to  claim 25 , further comprising a reflector directly underneath the light source. 
     
     
       27. The display device according to  claim 13 , wherein the display panel is a flat panel. 
     
     
       28. The display device according to  claim 27 , wherein the display panel is a liquid crystal panel.

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